The first section of the third phase of Wuhan Metro Line 11 "Jiangsheng" shield tunneling machine officially started

On September 23, with the slow rotation of the cutter head, the first section of the third phase of Wuhan Metro Line 11 "Jiangsheng" shield tunneling machine officially started, which is the first shield tunneling machine of the line.

On the same day, at the shield tunnel construction site near Wujindi, Baishazhou, Changjiang Daily saw that subway construction, construction and supervision personnel walked down the cage ladder to reach the bottom of the left-line tunnel, which is nearly 13 meters deep. The whole shield is about 85 meters long. Everyone walks from the end to the cab to observe every construction detail on site.

According to the introduction, the first section of the third phase of Line 11 Zhangjiawan parking lot out of the entrance line interval, the total length of 820 meters, 750 meters using shield construction, 70 meters using open excavation. At present, the open excavation section has been completed; The shield section starts from Zhangjiawan parking lot and will be received at Jiangmin Road section.

"When the shield starts, it's a very critical point. There is no turning back. Once the shield machine starts, it must be mastered in real time to dig the speed and attitude." According to the introduction, the section is about 500 meters away from the Yangtze River, through the main stratum of the Yangtze River terrace, the stratum is soft, water content is large, also need to go through the high-voltage power jacking pipe, gas, water, rainwater, sewage and other pipelines. "It is important to note that 11 line three periods of zhangjiawan parking lot out admission line tunnel and planning stage 11 line 4 are overlapped tunnel, the third phase of the tunnel is located in the upper part, in order to reserved for four period of tunnel construction conditions, the need to reinforce the soft soil in advance, the project department should organize units optimized design scheme, in ensuring the engineering quality, safety, under the premise of reduced scope, saving investment."

According to reports, the first section of the third phase of Line 11, from Wuchang Railway Station to Baishazhou, a total length of 4 kilometers, with 2 stations and 3 sections. At present, the main structure of two stations has been completed, and one of the three sections is under shield tunneling. After completion and opening to traffic, it can effectively relieve the traffic congestion in Baishazhou area and provide convenience for the surrounding citizens to travel.